An ultra high performer for all seasons, the Ecsta ASX combines outstanding wet and dry grip with high performance handling and competent snow traction. The asymmetrical tread design allows the ASX to be cross-rotated for reduced noise and everyday use. Specifically built for value-oriented drivers who do not want to skimp on performance, the Ecsta ASX delivers handling and grip performance that goes far beyond its price.

  • Asymmetrical tread design optimizes all-season performance.
  • High-tech silica compound delivers the optimum balance of wet and snow traction, treadwear and fuel efficiency.
  • Large outside blocks maximize cornering performance.
  • High-angle slant and circumferential grooves provide optimum water drainage to resist hydroplaning.
  • E-technology step grooves and sipes increase edge effect for increased wet and snow performance.
  • Multi-zone tread contour provides dynamic casing control for improved comfort and handling.
  • ESCOT technology controls the tension throughout the casing to provide a comfortable ride and maintain performance handling.
  • The jointless cap and edge covers keep the two full-width steel belts in place to ensure strength, stability and maximum footprint during high performance driving.
  • Variable pitch tread blocks and cross-grooves reduce road harmonics for a quiet ride.
  • Rim protector in lower sidewall safeguards wheel from scratches and abrasions.

Detailed Information

Type and Size
Tire Model
Kumho Ecsta ASX KU21
Car Type
All Season
Rim Diameter
16 / 17 / 18 "
205 / 215 / 225 / 235 / 245 / 255 mm
Aspect Ratio
40 / 45 / 50 / 55 %
Special Features
Mud and Snow
Extra Load
Speed and Load
Speed Index
W (max 168 mph) ... Z (max > 149 mph)
Load Index (max load for a tire)

Kumho Ecsta ASX KU21 Sizes & Specifications

Rim Model Size Index Features
R16 205/55 R16 91Z 205/55 R16 91Z
R16 215/50 R16 90W 215/50 R16 90W
R16 215/50 R16 90Z 215/50 R16 90Z
R17 215/45 R17 91Z 215/45 R17 91Z
R17 215/50 R17 95Z 215/50 R17 95Z
R17 225/45 R17 94Z 225/45 R17 94Z
R17 225/55 R17 97Z 225/55 R17 97Z
R17 235/45 R17 94Z 235/45 R17 94Z
R17 245/45 R17 95Z 245/45 R17 95Z
R17 255/45 R17 98Z 255/45 R17 98Z
R18 225/40 R18 92Z 225/40 R18 92Z
R18 235/50 R18 97Z 235/50 R18 97Z

Amazon Reviews Kumho Ecsta ASX KU21

Questions and Answers

  • Mar 18, 2009

    Tested: Reinventing an Icon I Tire Rack

    Continuing the sporty heritage of the original Eagle GT and its successors, the new Goodyear Eagle GT is a more attractively priced companion to Goodyear's popular Eagle F1 All-Season in the Ultra High Performance All-Season category. It is designed to blend a stylish tread design with real wet and dry performance, reasonable road manners and some all-season light snow and slush capability.